Malicious PDF — malware analysis report

Static analysis result for SHA-256 37fc6f964b830abc…

MALICIOUS

PDF

59.9 KB Created: 2021-02-25 21:18:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6f566abff63b39dc72c5b613c5a13223 SHA-1: ae2fe0d99667ce81140893e8ecf09ad9e21db498 SHA-256: 37fc6f964b830abcbe2720bd47bf3fea75c399d964575440a7dca2aba1d45c06
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous embedded URLs, many of which are hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains keywords related to free PDF downloads, aligning with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7927

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://maypoin.ru/award?keyword=pilgrim%2527s+progress+pdf+free+download PDF link annotation
    • http://labifovejes.mypressonline.com/86156100489.pdfIn PDF document text
    • https://fivipogokofabid.weebly.com/uploads/1/3/0/7/130776003/metifufipev-ravigi.pdfIn PDF document text
    • http://1xbet-football.fun/similes_and_metaphors_worksheets_middle_schoolrt0x2.pdfIn PDF document text
    • http://jibesikore.iblogger.org/sizezobif.pdfIn PDF document text
    • http://nasufulorejuwe.mywebcommunity.org/cultures_of_the_west_a_history_volume_2_since_1350.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379045/normal_601aa7af689af.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/78032492645.pdfIn PDF document text
    • http://meweremidef.iblogger.org/carryall_295_parts_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402953/normal_5fe2ebe0d5d71.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://molagegivijoxu.onlinewebshop.net/92022896758.pdfIn PDF document text
    • http://sojuwumupipijo.rf.gd/championship_manager_3_mac_free.pdfIn PDF document text
    • http://newemepakirid.myartsonline.com/what_are_you_searching_for_quotes.pdfIn PDF document text
    • http://xomapagovujux.atwebpages.com/21870939167.pdfIn PDF document text
    • http://fuvarijes.atwebpages.com/cards_against_humanity_online_gameplay.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ced3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED3 5488 bytes
SHA-256: cf0371ce715169d8c8351aa27c645443d2d5569b3d64af73d0baaca53856df68

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